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In North America, people who are facing each other generally want about three feet of space in front of them.

在北美，人们面对面交谈时要保留三英尺左右的距离。

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Here's another action shot where it's important to leave more space in front of a moving subject than behind it.

这是另一张动态照片。运动主体的前面比后面留有更多空间是很重要的。

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The Kepler space telescope looks for planets by measuring tiny decreases in the brightness of stars when planets cross in front of them.

VOA: special.2011.02.09

The postseason emblem also occupies a big swath of space in front of each dugout at all the parks.

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The video shows a small green pickup truck pulling into a parking space in front of Pepperell Sweets minutes before the connection was made to the MySpace profile.

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The sensor, or an array of them, would record the movement of your hands while they type against a keyboard projected by laser on your desk, or even in the space in front of you.

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